Manual guidewire placement device

摘要

An improved manual guidewire placement device to facilitate successful guidewire placement into a blood vessel by minimizing risks of needle tip disengagement with a penetrated blood vessel and by minimizing risks of blood vessels overpenetration. The device comprises a needle, a guidewire slideable within the needle, means of manually creating vacuum to accelerate backflow of blood upon occurred blood vessel penetration, means for manually advancing the guidewire, said means for manually advancing the guidewire being actuated by said means for creating the vacuum. Actuation of said means for guidewire advancement may be either achieved by release of said means for guidewire advancement, said advancing means being positioned within easy reach of the operator's hand which creates the vacuum, so that no repositioning of the vacuum creating hand nor a two hands operation is required, or may be accomplished by conversion of the manual action exerted upon said vacuum creating means into a guidewire advancing action exerted upon said means for advancing the guidewire. The above features are aimed at minimizing loss of needle tip engagement within the blood vessel and at preventing overpenetration.